Could a mitochondrial metabolite known as acetyl L carnitine (LAC) yield a new biomarker for depression and potential new therapies? Dr. Carla Nasca, an @nyugrossman assistant professor of psychiatry and of neuroscience and physiology, Acetyl L Carnitine Confident Health Acetyl L Carnitine 500 mg Capsules Exceptional Quality Momentous The Rockefeller University Lack of a single molecule may indicate severe and treatment resistant depression